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March 27, 1928. 1,663,872

E. J. ZOLLINGER CARBURETOR Filed July 28, 1925 2 Sheets-Shee l 72 g'nucnoz E. d. Z olli/'nger'- Much 27, 192s. 1,663,872

E. J. ZoLLlNGl-:R

CARBURETOR Filed July 28, 1925 2 Sheets-Sheet 2 L". di ZOZZ-rzgezn Patented Mar. 27, 1928.

UNITED STATES EZRA JACOB ZOLLINGER, OF LOGAN, UTAH.

CARBURETOR.

Application filed July 28, 1925.

This inventionrelates to an improved carburetor and seeks, among other objects, to provide a device of this character wherein vaporization of the liquidfuel will, as compared with existing devices, be more etlectively accomplished, wherein the fuel mixture will be rendered more combustible so that maximum energy will be realized from the quantity of fuel used, and wherein econoomy will be effected in the use of the f uel.

The invention seeks, as a further object, to provide a device wherein the liquid fuel Will .be heated .priorl to the vapor-ization thereof by a. stream of hot air subsequently mingled with the fuel to forma ciude heated vapor, and wherein the crude vapor will then` be diluted and cooled by a proportionate quantity offresh auxiliary air to forni a cool highlyV combustible fuel mixture.

The invention seeks, as a further object, to provide a device wherein the quantity of fresh air admitted will be automatically controlled and will be gradually increased with the speed of the engine to which the device isattached for thus effecting a saving in `the consumption of fuel and maintaining the fuel mixture at the proper temperature.

And the invention seeks, as a still further object., to so construct the device that the parts may Vbe readilyand economically formed and assembled.

Other objects ofthe invention not above specifically mentioned will appear as the description proceeds. A

In the accompanying drawings:

Figure 1is a vertical longitudinal sectional View through myimproved carburetor.

Figure 2'is a horizontal sectional view on the line 2-2 of Figure 1, looking in the direction indicated by the arrows.

Figure 3 is av vertical detail sectional view taken through the fuel nozzle at right angles to the section of Figure 1.

Figure 4 is a fragmentary elevation showing the auxiliary air port and the fuel vapor yport of the mixing chamber o f the device.

In carrying the invention into effect, l employ a cylindrical mixing chamber 1() having a bottom wall 11 extended to form an eccentrically disposed circular flange 12, and depending from said bottom wall is asteiii .13 having a diametric passage 14 and an Vaxial passage 15 leading downwardly therefrom and provided below the former passage with a shoulder 16. Formed in the rear side of the chamber 10 near its lower Serial No. 46,632.

end are vlike triangular auxiliary air ports 17 midway between which is provided an elongated tapered fuel vapor port k18 extending at its lower smaller end below the lower smaller ends of the ports 17, and extending from the opposite side of said chainber opposite said ports` is a fuel mixture outlet 19 fiangcd for attachment to an intake manifold. indicated at 20. The outlet carries a throttle valve 21, and rising from said outlet is a web 22 provided with a suction passage having angularly disposed communieating portions 23 and 24 connecting the base end of said outlet with the upper end of the mixing chamber 10. Screwed through said web to project across the upper end of the portionv 23 of the passage into the portion 24, isa yneedlevalve 25 adjustable for partially closing said passage. Near its lower. end, the'chamber 10 is provided with an internal annular ledge 26 disposed below the lower ends of the ports 17,` and extending through Vthe adjacent side of said ledge at the'lower end of the port 18 is apassage 27 while, at its opposite side, said ledge is provided with a like passage 28 communicating with the outlet 19. Slidably fitting in the mixing chamber is a hollow piston valve 29 which is open at its lower end and closed at its upper end and normally rests upon the ledge 26 extending over the poits 17 and 18 as well as the outlet 19. Closing the chainbenl() at its upper end is a removable .cover plateBO. Fitting the side wall of the chamberl() to overlie the poi-t 18 is an elbow-shaped fuelvaporiconduit 31, and straddling said conduit is a mating auxiliary air inlet 32 also fitting the wall of said chamber to overlie the ports 17. The conduit and said inlet are both detachably secured .to the said wall of the chamber and mounted in the inlet is an auxiliary air valve 33.'

Mating with the fiange 12 at the bottom of the chamber 10 is a fuel bowl 34, the bottom wall of which is apertured to it the stem 13, abutting the shoulder 16, and formed on the bowl is ya nipple 35 to which is attached a liquid fuel supply pipe 36. Pivotally mounted within the ,bowl is a valve lever 37 which is operated by a float 38 and carries a needle valve 39 controlling the admission of fuel to the bowl. Connected to said stem is a eruciform fitting 40 having a primary air inlet 41 opposite which is a communicating Venturi tube 42, and lying at a il Li right angle to said inlet and tube is a liquid fuel conduit 43 opposite which is an alined nipple 44 connected with said conduit by a tubular bridge member 45 extending across the` passage of the inlet 41 at the junction of said inlet With the tube 42. `The tube 4Q lits in the lower end of the conduit 31 and is secured by a set screwv 46, while the conduit is provided with a sleeve 47 `which lits over the stem 13 and is secured by a nut 48 screwed on the lower end of said stem, the bowl 34 being also thereby clamped in position. rlhe conduit 43 has a passage 49 which, at one end, communicates with a passage 50 through the bridge member 45 While, at its opposite end, the passage 49 enters the sleeve 47 to communicate with the passage 15 of the stem, and screwed into the nipple 44 is a needle valve 51 adjustable for regulating flow through said passages. Connected to the inlet 41 is a pipe 52 for supplying heated primary air to said inlet, and mounted in the inlet is a primary air inlet valve 53. Screwed at its `lower end into the bridge member 45 to communicate 1vith the passage 50 thereof is a liquid fuel nozzle 54 which extends axially of the Venturi tube 4Q and terminates at its upper end in the'throat of said tube above the level of the fuel in the bowl 34.

As will new be seen, when the engine is started, engine suction Will be communicated through the passages 27 and 28 to the conduit 31 so that heated primary air Will be drawn through the pipe 52 andinlet 41 around the bridge member 45 and upwardly through the tube 42 past the nozzle 54. The bridge member and nozzle will thus be heated by the currents of heated air so that the fuel flowing from the bowl 34 through the passages, 14, 15, 49 and 50 into the nozzle will, in turn, be heated by said bridge member and the nozzle. Heated liquid fuel will thus be aspirated by the current of heated air into the conduit 31 whereupon the atomized fueland air WillmiX to form a crude fuel vapor flowing through the passages 27 and Q8 and through the outlet 19 to the engine. Coincident with the starting of the engine, engine suction Willbe communicated through the portions Q3 and 24 of the suction passage to the chamber l above the valve 29 with the `result that said valve will be lifted to partially uncover the ports 17 and the outlet 19 so that fresh air Will be drawn in through the inlet 32 into the mixing chamber beneath the valve to 'mix With the fuel vapor and form a cooled highly combustible fuel mixture@ The valve is provided to regulate the suction through the portions Q3 and 24 of the suction passage in order that, as the engine is accelerated, the valve 29 will be gradually lifted,y and attention is noiv'directed to the fact that, as ythe valve is lifted 'to permit an increased flow of fuel nearly closed, and When the engine is idling,` y

said ports will be completely closed, 111 which event all the suction is exerted through the main air inlet 41 and the nozzle 54. All the admitted air will then be heat- Ved and while playing upon the bridge 45 and nozzle will tend to vaporize the fuel which could not occur if the air Were cold. 0f course, the air Will not be heated in originally starting the engine but this lcondition is 'met rby properly regulating the choker valves 33 and .53.

l-laving thus described the invention, What l claim is:

1. A carburetor including a mixing chainber provided in its Wall With a fuel inlet port and an auxiliary air inlet port as Well as a fuel mixture outlet, a suction operated valve slidable in saidchainber and normally closing said air inlet port `and `f-:xtendifng across the fuel inlet port and said outlet, a mixture conduit attached to the Wall of said chamber and overlying said fuel inlet port, a. liquid fuel nozzle, means :for con-ducting liquid fuel to the nozzle, and a separate 'fit-y ting mounting said nozzle and connected to said conduit, said :fitting being provided with a. primary hot air inlet supplying a currentof hot air heating the liquid fuelp'ri'or to entrance thereof into the nozzle and flowing about the nozzle for aspirating the fuel therefrom and supplying a heated fuel to said conduit. 4

Q. A carburetor including amixing chainu ber provided in its Wall with a fuel inlet port and an auxiliary air inlet port as Well as a fuel mixture out-let, a suction operated valve slidable in said chamber and normally extendingacross said outlet as well as said ports, a mixture conduit attached to the Wall of said chamber and overlying said port,` anl auxiliary air inlet straddling said conduit and attached to the Wall of said chamber to overlie said air port, a liquid fuel nozzle, means for conducting liquid fuel to the nozzle, and a separate fitting mounting said nozzle and connected to said conduit, vsaid fitting being provided With a Vprimaryhot air inlet supplying a current of hot air heating the liquid fuel prior to entrance thereof into the nozzle and flowing about the nozzle for aspirating the fuel therefrom and supplying a heated fuel to said conduit.

3. A carburetor including a mixing cham- Til Sin'

lll() lll! ber provided with a stem, a liquid uel bowl surrounding the stem, a separate fitting at taehed to the stem and provided with a Venturi tube communicating with the mixing chamber, the fitting being provided with a primary hot air inlet communicating with said tube and beingl lormed with a bridge member extending across said hot air inlet and receiving liquid Jfuel from the bowl through said stem and itting, and a nozzle mounted upon said bridge member to upstand within said tube, said primary hot air inletsupplying a current of hot air heating said bridge member and flowing about the nozzle for aspirating the fuel therefrom and supplying a heated l'uel mixture to the mixing chamber.

l. A Carburetor including a mixing chainber, a stein depending 'from the mixing chamber and having a fuel passage therethrough and provided with an external shoulder, a liquid fuel bowl abutting the bottom of the mixing Chamber and said shoulder, a fitting mounted on the stem against the bowl, the fitting having a i'uel passage communicating with the fuel passage in the stem, means for securing the fitting on the stem against the bowl and clamping the bowl against said shoulder and the mixing chamber, a /'enturi tube rising from the fitting and communicating with the mixing chamber, a` hot air inlet on the litting alined with the tube, a hollow bridge within the litting extending across said hot air inlet and receiving liquid fuel through the itting, a valve in said bridge for Controlling the flow ol fuel, and a nozzle rising from said bridge within the tube.

In testimony whereof I aiiix my signature.

nzRA JACOB zoLLINGER. [L 5.] 

